…Photochemical smog is a phenomenon in which photochemical oxidants are generated in the atmosphere, and the concentration of photochemical oxidants on the earth's surface increases due to weather conditions such as the formation of an inversion layer, weak winds, moderately strong sunlight, and high temperatures. Photochemical oxidants are a collective name for atmospheric substances that have a stronger oxidizing power than oxygen and oxidize potassium iodide in a neutral potassium iodide solution to liberate iodine. Most of these are ozone O3 , with trace amounts of peroxides such as peroxyacetylnitrate (PAN) and peroxybenzoylnitrate (PBzN). Ozone is released when nitrogen monoxide (NO) or nitrogen dioxide ( NO2 ) (collectively referred to as NOx ) undergoes a complex photochemical reaction with hydrocarbons. … *Some of the terminology explanations that mention "peroxyacetilnitrate" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…光化学スモッグとは,光化学オキシダントが大気中で生成し,逆転層の形成や風が弱く太陽光線が適度に強く気温が高いなどの気象条件によって,地表での光化学オキシダント濃度が高くなる現象をいう。光化学オキシダントoxidantは酸素よりも酸化力が強く中性ヨードカリ溶液中のヨードカリを酸化してヨードを遊離させる大気中物質を総称する呼名で,その大部分はオゾンO3であり,パーオキシアセチルナイトレートperoxyacetilnitrate(PAN),パーオキシベンゾイルナイトレートperoxybenzoylnitrate(PBzN)などの過酸化物も微量含まれている。オゾンは,一酸化窒素NOや二酸化窒素NO2(双方合わせてNOxと表す)が炭化水素と複雑な光化学反応を行って,放出される。… ※「peroxyacetilnitrate」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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